CN110545002B

CN110545002B - Sealed motor vehicle starter with angularly wedged brush-holder gasket

Info

Publication number: CN110545002B
Application number: CN201910451722.1A
Authority: CN
Inventors: R.维达尔; T.古斯尼; M.根蒂尔
Original assignee: Valeo Equipements Electriques Moteur SAS
Current assignee: Valeo Equipements Electriques Moteur SAS
Priority date: 2018-05-28
Filing date: 2019-05-28
Publication date: 2021-07-23
Anticipated expiration: 2039-05-28
Also published as: MX2019006152A; CN110545002A; FR3081632A1; FR3081632B1

Abstract

One aspect of the invention relates to a motor vehicle starter comprising: a yoke comprising an axial bore having two longitudinal faces; a brush-holder washer comprising a protrusion, the protrusion comprising: a first axial portion including a first end and a second end opposite the first end; a second radial portion integral with the second end and oriented towards the outside, comprising two radial faces and two stop faces in contact with each of the two longitudinal faces of the axial hole in the yoke; a grommet (300) including a radial hole (304), the radial hole (304) receiving the second radial portion of the protrusion such that the grommet contacts both radial faces of the second radial portion in the axial hole in the yoke.

Description

Sealed motor vehicle starter with angularly wedged brush-holder gasket

Technical Field

The technical field of the invention is starters, in particular motor vehicle starters.

The present invention relates to a starter, and more particularly to a starter including a brush-holder gasket and a grommet that may ensure improved sealing of the starter and improved angular wedging of the brush-holder gasket.

Background

The existing starter comprises an electric motor comprising a stator, a rotor with a rotor shaft and a yoke, in which coils or magnets constituting the inductors of the stator are arranged. The yoke comprises a rear portion, the ends of which are closed by a cover comprising a rear bearing supporting the rotor shaft of the actuator. A brush-holder washer is disposed between the yoke and the cover such that the brush-holder washer covers an end of the rear portion of the yoke. The brush-holder washer supports brushes that allow power to be supplied to the armature windings of the rotor. The cover is fixed to the front bearing of the actuator by fixing means, such as a longitudinal tie-rod, located outside the yoke and retaining the cover on the yoke. Thus, the brush-holder washer is placed against the end of the rear portion of the yoke on the one hand and against the cover on the other hand. In other words, the brush-holder washer is sandwiched between the yoke and the cover.

The yoke also comprises a radial opening forming an axial recess for the passage of the electrical conductor to supply the rotor with electricity through the brushes, the passage of the conductor taking place through the grommet, a portion of which is fitted in the recess made of rubber material to ensure the seal between the grommet and the recess. The brush-holder washer includes one or more protrusions in a notch in the yoke to ensure angular wedging thereof. However, this arrangement does not ensure a good seal at the contact area between the brush-holder gasket and the recess in the yoke. Thus, liquids such as water, particularly saline water, may seep into the yoke by capillary action between the notches in the yoke on the brush-holder washer, which may cause degradation of the components located inside the yoke.

Solutions have been proposed to ensure a seal between the brush-holder gasket and the recess in the yoke. The device according to the prior art comprises providing two radial holes extending from the outer periphery of the brush-holder washer towards its centre, passing axially through the brush-holder washer. The brush-holder washer includes a solid portion between two apertures. Thus, the solid part is arranged in a radial hole through the grommet, which is itself arranged in contact with the entire recess in the yoke. Thus, there is no longer any contact surface between the notch in the yoke and the brush-holder washer. However, this solution does not allow angular wedging of the brush-holder washer, since a portion of the grommet surrounding the solid portion is made of a rubber material.

Angular wedging of the brush-holder gasket relative to the yoke is therefore required while ensuring a seal between the brush-holder gasket and the recess in the yoke.

Disclosure of Invention

The present invention provides a solution to the aforementioned problems by making it possible to wedge the brush-holder gasket of the starter at an angle without introducing a permeable region between the notch in the yoke and the brush-holder gasket.

One aspect of the invention relates to a motor vehicle starter comprising:

-a yoke about an axis X, comprising a front portion and a rear portion in an axial direction, the rear portion comprising a radial end and a notch forming an axial bore extending axially from the radial end of the yoke towards the front portion of the yoke, the axial bore passing radially through the yoke and comprising two longitudinal faces;

-a brush-holder washer, about an axis X, comprising a front radial face in contact with a radial end of the yoke;

-a grommet fitted in an axial hole in the yoke, comprising a passage for an electrical conductor for supplying power to the actuator;

the starter is characterized in that:

-the brush-holder washer comprises a protrusion comprising:

a first axial portion comprising a first end integral with the front radial face and a second end opposite the first end; and

a second radial portion integral with the second end and oriented towards the outside, comprising two radial faces and two stop faces in contact with each of the two longitudinal faces of the axial hole in the yoke;

the grommet comprises a radial hole which receives the second radial portion of the projection such that the grommet is in contact with both radial faces of the second radial portion in the axial hole in the yoke.

Thanks to the invention, sealing at the angular wedge of the brush-holder gasket is improved. In fact, the angular wedging is carried out on the one hand by wedging the second radial portion of the projection in the axial hole in the guard ring and on the other hand by the recess in the yoke on the inside of the yoke. Thus, the angular wedging is performed outside the sealing zone and does not introduce a permeable zone.

In addition to the features just described in the preceding paragraph, the starter according to an aspect of the invention may have one or more of the following complementary features, considered alone or according to all technically possible combinations.

According to another aspect of the invention, a portion of each stop surface of the second radial portion is in contact with the guard ring. This makes it possible to improve the sealing at the second radial portion of the projection. In particular, the entire surface of each stop face of the second radial portion is in contact with the guard ring, except for the portion in contact with the axial hole in the yoke. The contact is advantageously flat.

The yoke includes a cylindrical surface and the grommet may contact a region of the cylindrical surface surrounding the axial bore in the yoke. The grommet thus forms a seal around the recess in the yoke. In particular, the grommet is in contact with an area of the cylindrical surface surrounding a portion of each longitudinal face of the axial bore in the yoke in contact with the radial face of the second radial portion of the projection. Thus, sealing is improved in this contact area between the brush-holder gasket and the yoke.

According to an embodiment, the brush-holder washer comprises an outer periphery and a radial hole extending from the outer periphery towards an axis X passing axially through the radial hole with an end, and the projection of the brush-holder washer is integral with the end of the radial hole.

According to an example of this embodiment, the protruding portion is integral with the brush-holder washer, the material being, for example, steel.

Thus, the projection and the brush-holder washer form a single-piece element, and the projection of the brush-holder washer can be formed by a continuous bending of a portion of the material of the brush-holder washer. This makes it possible to facilitate the production process and reduce the cost while having a strong protrusion.

According to an example of this embodiment, the grommet partially fills the radial hole in the brush-holder washer. For example, the grommet includes a portion that extends from the outer periphery of the brush-holder washer into a radial hole in the brush-holder washer.

The grommet thus ensures sealing of the top of the recess in the yoke. Thus, the grommet improves the seal by preventing the passage of liquid through the radial hole.

According to an embodiment, which can be combined with the preceding embodiments, the grommet covers all surfaces of the axial hole in the yoke so as to form a seal between the inside and the outside of the circumference of the axial hole in the yoke. The grommet thus acts as a seal to ensure sealing of the recess in the yoke.

According to an embodiment, which can be combined with the preceding embodiments, the radial holes in the guard ring are through holes. This makes it possible to make the size of the second radial portion of the projection less restrictive and therefore to reduce costs.

According to this embodiment, the radially inner portion of each stop surface of the second radial portion is in contact with the guard ring.

According to an embodiment which is a variant of the previous embodiment and which can be combined with other embodiments, the radial hole in the guard ring comprises an end of a radially closed hole which is opposite to the axial face of the second radial portion of the projection and is angularly flanked, said hole comprising a longitudinal opening opposite to the respective longitudinal face of the axial hole, so that each of the two stop faces is in contact with the respective longitudinal face of the axial hole.

According to this embodiment, a portion of the stop face surrounding each stop face of the second radial portion is in contact with the guard ring.

The axial faces are delimited by the two stop faces and by the two radial faces of the second radial portion of the projection. This therefore improves the seal, as the projection has no part in the open. In effect, the grommet improves the seal at the axial face of the second radial portion of the projection.

According to an example, the end portion is in contact with an axial face of the second radial portion. This makes it possible to improve wedging of the grommet.

According to an embodiment, which may be combined with other previous embodiments, the actuator comprises a rear bearing surrounding the rear portion of the yoke and in contact with the radial face of the grommet. This therefore improves the seal between the rear bearing and the shroud ring.

The grommet may include a border around the rear bearing to improve sealing.

According to an embodiment, which can be combined with other previous embodiments, the yoke comprises an inner cylindrical surface and an outer cylindrical surface, and the grommet comprises two rails, each rail having two axial faces, each axial face surrounding a region of the inner cylindrical surface surrounding the axial hole in the yoke and a region of the outer cylindrical surface surrounding the axial hole in the yoke, each of the two rails further comprising a longitudinal face, and the radial hole comprises a longitudinal opening in the longitudinal face on both sides at an angle, such that the stop face is in direct contact with both longitudinal faces of the axial hole. Thus, it is facilitated to arrange the guard ring over the recess in the yoke, while improving the sealing of the recess in the yoke.

According to an embodiment, which may be combined with other previous embodiments, the grommet may comprise a front radial face opposite to the radial face or end of the recess in the yoke, and the actuator may comprise a gap between the end of the recess in the yoke and the grommet, comprising an inner axial face and an outer axial face, each extending from the front radial face towards the end of the recess, each comprising at least one portion in contact with a region surrounding the inner and outer cylindrical surfaces, respectively, of the recess in the yoke. Thus, the radial hole in the grommet makes it possible to retain the brush-holder washer by means of the second radial portion of the projection, despite such assembly clearance.

According to an embodiment, which may be combined with other previously described embodiments, the grommet comprises an axial portion which is in contact with an axial surface of the first axial portion of the protrusion and which partially fills the axial hole in the yoke. The grommet thus ensures sealing of the top of the recess in the yoke.

The invention and its various applications will be best understood by reference to the following description and drawings.

Drawings

The drawings are provided by way of illustration and are not intended to limit the invention in any way.

Fig. 1A and 1B show two different views of a schematic view of a yoke of a starter according to an aspect of the invention.

Fig. 2A and 2B show two different views of a schematic of a brush-holder washer of a starter according to an aspect of the invention.

Figures 3A and 3B show two different views of a schematic view of a first embodiment of a grommet of a starter according to an aspect of the invention.

Fig. 4 shows the brush-holder washer shown in fig. 2A and 2B, which is provided with a grommet according to the first embodiment shown in fig. 3A and 3B.

Figure 4A is an enlarged view of a portion of figure 4.

Fig. 5 shows a grommet according to the first embodiment shown in fig. 3A and 3B, arranged with the yoke shown in fig. 1A and 1B.

Fig. 6A and 6B show two different views of the brush-holder washer shown in fig. 2A and 2B, arranged with a grommet according to the first embodiment shown in fig. 3A and 3B, itself arranged with the yoke shown in fig. 1A and 1B.

Fig. 7 shows a schematic view of a first embodiment of a starter according to an aspect of the invention.

Fig. 8 shows the brush-holder washer shown in fig. 2A and 2B, arranged with a grommet according to the second embodiment, itself arranged with the yoke shown in fig. 1A and 1B.

Fig. 9 shows a schematic view of a second embodiment of a starter according to an aspect of the invention.

Detailed Description

Unless otherwise indicated, identical elements shown in different figures have a single reference numeral.

One aspect of the present invention is directed to

starter

500, 800 that includes yoke 100,

grommet

300, 700, and brush-holder washer 200 shown in fig. 6A and 6B and in fig. 8 according to another embodiment.

The actuator further comprises a rear bearing 400 as shown in fig. 7 or in fig. 9 according to another embodiment.

Fig. 1A is a schematic view of yoke 100 of

actuator

500, 800, also shown in fig. 1B, with a different view.

The yoke 100 has a substantially cylindrical shape according to the rotation axis X. Thus, the yoke 100 has two opposite radial ends. The adjective "radial" means lying on a radial plane. "radial plane" means a plane perpendicular to the axis X.

The two radial ends make it possible to define a front portion 101 and a rear portion 102 of the yoke 100. The rear radial end 104 contacts the brush-holder washer 200 in fig. 6A, and the front radial end contacts the front bearing.

The rear portion 102 of the yoke 100 includes a rear portion 103. The rear portion 103 is the portion of the yoke 100 extending from the radial end 104 towards the front portion 101 of the yoke 100, which is covered by the rear bearing 400 when the yoke 100 is fitted in the actuator 500, 800 (as shown in fig. 7 and in fig. 9 according to another embodiment).

The rear portion 102 of the yoke 100 includes a notch that extends from the rear radial end 104 toward the front portion 101 of the yoke 100 and radially through the yoke 100. The recess thus forms an axial bore 105. The adjective "axial" means lying on an axial plane. "axial plane" means a plane parallel to axis X, which does not contain axis X. Thus, the rear radial end 104 has an annular shape defined by an inner radius and an outer radius, with a hole on its circumference.

The notch in the yoke 100 includes an end. The notch comprises two longitudinal faces 106 and a radial face, in this case circular, corresponding to the ends of the notch, so that the notch is substantially symmetrical with respect to an axis parallel to the axis X, passing through the middle of the notch. The adjective "longitudinal" means lying on a longitudinal plane. "longitudinal plane" means a plane containing the axis X. In this case, the recess has a circular shape to simplify the production process.

The yoke 100 comprises an inner cylindrical surface facing the axis X and an outer cylindrical surface opposite to the inner cylindrical surface. The portion of the outer cylindrical surface 107 surrounding the axial bore 105 in the yoke 100 is indicated by shading in fig. 1A, and the portion of the inner cylindrical surface 108 surrounding the axial bore 105 in the yoke 100 is indicated by shading in fig. 1B.

It can be seen that a portion of the outer cylindrical surface 107 is adjacent to both longitudinal faces 106 and the radial face, which in this case is circular.

The yoke 100 is made of iron or ferromagnetic steel, for example.

Fig. 2A is a schematic view of brush-holder washer 200 of

starter

500, 800, also shown in fig. 2B, with a different view.

Brush-holder washer 200 has a circular shape with an outer periphery 202 and is about axis X so as to cover rear radial end 104 of yoke 100 inside

starter

500, 800 without extending from yoke 100, as shown in fig. 7 and in accordance with another embodiment in fig. 9. In other words, the radius of the brush-holder washers 200, 600 is approximately equal to the outer radius of the rear radial end 104 of the yoke 100.

Brush-holder washer 200 has two radial faces, a rear radial face, that includes at least one portion that contacts rear bearing 400 when the washer is assembled in rear bearing 400, as shown in fig. 7 and according to another embodiment in fig. 9, and a front radial face 201 that contacts rear radial end 104 of yoke 100.

Brush-holder washer 200 includes a protrusion 203 that is integral with a front radial face 201 of brush-holder washer 200. The projection 203 comprises a first axial portion 204 and a second radial portion 207, the first axial portion 204 and the second radial portion 207 being integral with each other. The first axial portion 204 comprises a first end 205 integral with the front radial face 201 and a second end 206 integral with the second radial portion 207, the first end 205 and the second end 206 of the first axial portion 204 being opposite each other.

The dimensions of the first axial portion 204 and the second radial portion 205 may be the same, i.e. if the first axial portion 204 and the second radial portion 205 have, for example, a parallelepiped shape, the first axial portion 204 and the second radial portion 205 have the same length, the same width and the same height. Thus, the projections of the first axial segment 204 and the second radial segment 205 on the plane of the brush-holder washer 200 have an "I" form.

The first axial portion 204 and the second radial portion 205 may be different sizes. This is particularly the case in the example shown in fig. 2A and 2B. Thus, the projections of the first axial segment 204 and the second radial segment 205 on the plane of the brush-holder washer 200 have, for example, a "T" form.

According to the embodiment shown in fig. 2A and 2B, brush-holder washer 200 includes a radial bore 210 that extends radially through brush-holder washer 200 and extends from outer periphery 202 of brush-holder washer 200 toward axis X. The radial bore 210 in the brush-holder washer 200 includes an end 211 that is integral with the first end 205 of the first radial portion 204 of the protrusion 203. Thus, the protrusion 203 is integral with the front radial face 201 of the brush-holder washer 200 by virtue of the end 211 of the radial hole 210 in the brush-holder washer 200. In this embodiment, the protrusion 203 and the brush-holder washer 200 form a single piece element, and the protrusion 203 is formed, for example, by a continuous bend of a portion of the material of the brush-holder washer 200.

According to another embodiment, not shown, the projection 203 is fixed on the front radial face 201 of the brush-holder washer 200 by screws or any other self-assembling fixing means.

The first axial portion 204 of the projection 203 comprises two axial faces, namely an inner axial face directed towards the axis X, and an outer axial face 213 directed towards the outside. In this case, a portion of the outer axial surface 213 of the first axial portion 204 of the protrusion 203 may be in contact with the axial portion 306 of the

shroud ring

300, 700, as shown in fig. 6A, and according to another embodiment, in fig. 8.

The second radial portion 207 of the projection 203 comprises two radial faces 208, two axial faces (i.e. an inner axial face directed towards the axis X and an outer axial face 212 directed towards the outside) and two longitudinal or stop faces 209. Inside the

actuator

500, 800, each stop face 209 is in contact with a longitudinal face 106 of the axial hole 105 in the yoke 100.

The brush-holder washer 200 is made of, for example, steel or aluminum.

Fig. 3A is a schematic view of a first embodiment of a grommet 300 of an initiator 500, also shown in fig. 3B, with a different view.

The grommet 300 has a substantially symmetrical form with respect to an axis parallel to the axis X passing through the middle of the grommet 300.

The grommet 300 includes radial holes 304 that receive the second radial portions 207 of the tabs 203 of the brush-holder washer 200, as shown in fig. 4, such that each radial face 208 of the second radial portions 207 of the tabs 203 is in contact with a radial face of the radial holes 304 in the grommet 300.

Fig. 4A shows an enlarged view of fig. 4. This fig. 4A shows an enlarged view of the side of the grommet 300. The grommet 300 has resilient longitudinal faces 303 at an angle on both sides (i.e., on both sides of the grommet), the longitudinal faces 303 being in contact with the longitudinal faces 106 of the axial bore 105 when the grommet 300 is fitted in the axial bore 105 in the yoke 100. The radial bore 304 includes longitudinal openings 309 on both sides at an angle on the longitudinal face 303. Thus, at least one of the two stop surfaces 209 is in contact with a corresponding longitudinal surface of the axial bore 105.

Prior to assembly of the grommet 300 and brush-holder washer 207 assembly shown in fig. 4, each of the two stop surfaces 209 is recessed from or swept over a longitudinal face 303 of the grommet. Thus, when the assembly is fitted in the yoke, the resilient longitudinal face 303 is deformed and the two stop faces 209 are in contact with the longitudinal face 106 of the axial hole 105.

The cross-section of radial hole 304 in grommet 300 in the disassembled state is smaller than the cross-section of second radial portion 207 of protrusion 203 of brush-holder washer 200. Thus, the second radial portion 207 of the protrusion 203 of the brush-holder washer 200 deforms the radial hole 304 of the grommet 300 in the assembled state.

According to a first embodiment shown in fig. 3A and 3B, the radial bore 304 in the grommet 300 is not a through bore, i.e. the radial bore 304 has an axial end, and the outer axial face 212 of the second radial portion 207 of the protrusion 203 is in contact with the axial end.

The grommet 300 has a form that allows it to fit in the axial hole 105 in the yoke 100. In fig. 5, the grommet 300 is in contact with at least one region of the cylindrical surface surrounding the axial bore 105, i.e. with a region of the outer cylindrical surface 107 and/or a region of the inner cylindrical surface 108 surrounding the axial bore 105.

In this case, in fig. 5, the grommets are in contact with a region of the outer cylindrical surface 107 and a region of the inner cylindrical surface 108 and with the edge or longitudinal face 106 of the axial bore 105 in the yoke 100.

According to the embodiment shown in fig. 3A and 3B, the grommet 300 comprises two rails 301, each having two axial faces 302, an inner axial face directed towards the axis X and an outer axial face directed towards the outside, and a longitudinal face 303. Then, as shown in fig. 5, the grommet 300 is fitted in the axial hole 105 in the yoke 100, i.e., for each rail 301, the inner axial face 302 is in contact with the area around the inner cylindrical surface 108 of the axial hole 105, and the outer axial face 302 is in contact with the area around the outer cylindrical surface 107 of the axial hole 105. More specifically, each track 301 surrounds the inner and outer

cylindrical surfaces

108, 107 of the area surrounding the cylindrical surface of the axial bore 105 in the yoke 100 to provide a seal between the inside and outside of the perimeter of the axial bore 105 in the yoke 100. Thus, the grommet 300 covers all of the axial holes 105 in the yoke 100 and all of the cylindrical surface surrounding the axial holes 105 in the yoke 100.

The end or radial face of the axial bore 105 in the yoke 100 may contact the radial face of the grommet 300, not shown in the figures, depending on the deformation. It should be appreciated that due to the resilient material of the grommet 300, the rail 301 of the grommet 300 may deform to contact the area of the outer cylindrical surface 107 and the area of the inner cylindrical surface 108 surrounding the axial hole 105 in the yoke 100 and the edge or longitudinal face 106 of the axial hole 105 in the yoke 100. The

initiators

500, 800 may have a clearance between the end or radial face of the axial bore 105 in the yoke 100 and the radial face of the grommet 300 connecting the two rails 301. Indeed, the fact of having radial holes 304 in the grommet 300 allows the brush-holder washer 200 to retain the

grommet

300, 700 in the recess despite such assembly clearance.

In particular, the two tracks 301 of the grommet 300 are connected by radial tracks (not shown in the figures) which together form a "U" shaped groove. The radial tracks comprise radial faces, an inner axial face directed towards the axis X and an outer axial face directed towards the outside, which extend from the inner axial face 302 and the outer axial face 302 of the two longitudinal tracks 301.

Thus, all edges of the axial bore 105 in the yoke 100 are surrounded by the grommet 300 for improved sealing.

The axial portion 306 of the grommet 300 partially fills the axial bore 105 in the yoke 100.

The grommet may include a boundary around the rear bearing within the

initiator

500, 800.

The grommet is made of an elastomer.

Fig. 6A and 6B illustrate the arrangement of brush-holder washer 200 in grommet 300 and the arrangement of grommet 100 over the recess in yoke 100.

Second radial portion 207 of protrusion 203 of brush-holder washer 200 is disposed in radial hole 304 in grommet 300. The grommet 300 is disposed in the axial hole 105 in the yoke 100 so as to cover the axial hole 105. Thus, the axial bore 105 in the yoke 100 is no longer visible from within the outer side of the yoke 100. Each stop face 209 of the second radial portion 207 of the protrusion 203 of the brush-holder washer 200 thus contacts the longitudinal face 106 of the axial bore 105 in the yoke 100, allowing angular wedging of the brush-holder washer 200. Thus, angular wedging of the brush-holder gasket 200 occurs in the notch in the yoke 100, thus improving sealing, as angular wedging of the brush-holder gasket 200 occurs inside the yoke 100, outside of the sealing area.

The grommet 300 partially fills the radial hole 210 in the brush-holder washer 200, having an axial portion 306 in contact with the outer axial face 213 of the first axial portion 204 of the protrusion 203 of the brush-holder washer 200.

Fig. 7 is a schematic diagram of a first embodiment of initiator 500.

The rear bearing 400 is fitted over the brush-holder washer 200 disposed in the grommet 300, the grommet 300 itself being disposed in the yoke 100.

The rear bearing 400 surrounds the rear portion 103 of the yoke 100 with the brush-holder washer 200 placed on the rear radial end 104 of the yoke 100.

The aft bearing 400 contacts the radial face 305 of the shroud's axial portion 306, allowing abutment.

The rear bearing 400 is made of aluminum or an alloy containing aluminum, or is made of steel.

Fig. 8 and 9 show a second embodiment of the invention. In this second embodiment, actuator 800 is identical to previously described actuator 500, except for the elements that will be described below.

According to a second embodiment shown in fig. 8, the radial hole 704 in the grommet 700 is a through hole, i.e. the outer axial face 212 of the second radial portion 207 of the protrusion 203 is visible from the outside.

Additionally, in this embodiment, it can be seen in fig. 8 that the brush-holder washer 200 includes a radial bore 210 that is wider than the axial bore 105 in the yoke 100. In other words, the longitudinal faces 106 of the axial bore 105 are closer to each other than the edges or radial faces of the radial bore 210 in the brush-holder washer 200. Thus, in contrast to another embodiment in which axial bore 105 is wider than radial bore 210 in brush-holder washer 200, radial end 104 of yoke 100 is opposite radial bore 210 in brush-holder washer 200.

Thus, the grommet 700 includes a base portion that includes a radial face 305 and two axial faces 307 that contact the edge or radial face of the radial hole 210. Grommet 700 additionally includes two radial faces 308 of stops that contact two portions of the radial face of radial end 104 of yoke 100, as opposed to an embodiment of grommet 300 where two radial faces 308 of stops contact two portions of front radial face 201 of brush-holder washer 200. This therefore makes it possible to simplify the insertion of the grommet 700 in the axial hole 105 in the yoke 100, but also to improve the limitation of the axial dimension of the grommet 300 with respect to the axial hole 105 or recess in the yoke 100. Indeed, in another embodiment, in contrast to this embodiment, the shroud ring 300 abuts the yoke 100 through a radial face of the radial track of the shroud ring 300 (which cannot be seen by the operator). Additionally, in this embodiment, the grommet 700 may have an axial dimension to include a gap between the radial face of the radial track and the end of the recess or axial bore 105 in the yoke 100.

Claims

1. A motor vehicle starter (500, 800) comprising:

-a yoke (100) around an axis X, comprising a front portion (101) and a rear portion (102) in an axial direction, the rear portion (102) comprising a rear portion (103), the rear portion (103) comprising a radial end (104) and a notch forming an axial hole (105), the axial hole (105) extending axially from the radial end (104) of the yoke (100) towards the front portion (101) of the yoke (100), the axial hole (105) passing radially through the yoke (100) and comprising two longitudinal faces (106);

-a brush-holder washer (200) around an axis X comprising a front radial face (201) in contact with a radial end portion (104) of the yoke (100);

-a grommet (300, 700) fitted in an axial hole (105) in the yoke (100) comprising a passage for an electrical conductor for supplying power to the initiator (500, 800);

the actuator (500, 800) is characterized in that:

-the brush-holder washer (200) comprises a protrusion (203), the protrusion (203) comprising:

-a first axial portion (204) comprising a first end (205) and a second end (206) opposite to the first end (205), the first end (205) being integral with the front radial face (201); and

-a second radial portion (207) integral with the second end (206) and oriented towards the outside, comprising two radial faces (208) and two stop faces (209) in contact with each of the two longitudinal faces (106) of the axial hole (105) in the yoke (100);

-the grommet (300, 700) comprises a radial hole (304, 704) receiving the second radial portion (207) of the protrusion (203) such that the grommet (300, 700) is in contact with both radial faces (208) of the second radial portion (207) in the axial hole (105) in the yoke (100).

2. The actuator (500, 800) of claim 1, wherein a portion of each stop surface (209) of the second radial portion is in contact with the grommet (300, 700).

3. The initiator (500, 800) of claim 1 or 2, characterized in that the yoke (100) comprises a cylindrical surface and in that the grommet (300, 700) is in contact with an area of the cylindrical surface (107, 108) surrounding the axial hole (105) in the yoke (100).

4. The starter (500, 800) of claim 1, wherein the brush-holder washer (200) includes an outer periphery (202) and a radial hole (210), the radial hole (210) extending from the outer periphery (202) toward an axis X passing axially therethrough, the radial hole (210) having an end (211), and the protrusion (203) of the brush-holder washer (200) being integral with the end (211) of the radial hole (210).

5. The starter (500, 800) of claim 3, wherein the grommet (300, 700) partially fills a radial hole (210) in the brush-holder gasket (200).

6. The initiator (800) of claim 1, wherein the radial hole (704) in the grommet (700) is a through hole.

7. The actuator (500) according to claim 1, characterized in that the radial hole (304) in the grommet (300) comprises an end closing radially the radial hole (304), which is opposite to the axial face (212) of the second radial portion (207) of the protrusion (203), and in that it comprises a longitudinal opening (309) angularly on both sides opposite to the respective longitudinal face (106) of the axial hole (105), so that each of the two stop faces (209) is in contact with the respective longitudinal face (106) of the axial hole (105).

8. The actuator (500, 800) of claim 1, comprising a rear bearing (400) surrounding the rear portion (103) of the yoke (100) and in contact with a radial face (305) of the grommet (300, 700).

9. The actuator (500, 800) according to claim 1, characterized in that the yoke (100) comprises an inner cylindrical surface (108) and an outer cylindrical surface (107) and the grommet (300, 700) comprises two rails (301), each rail having two axial faces (302), each axial face surrounding the area of the inner cylindrical surface (108) surrounding the axial hole in the yoke (100) and the area of the outer cylindrical surface (107) surrounding the axial hole in the yoke (100), each of the two rails further comprising a longitudinal face (303) and the radial hole comprising a longitudinal opening (309) in the longitudinal face (303) angularly on both sides, so that the stop face (209) is in direct contact with both longitudinal faces (106) of the axial hole (105).

10. The initiator (500, 800) of claim 1, wherein the grommet (300, 700) comprises an axial portion (306), the axial portion (306) being in contact with an axial surface (213) of the first axial portion (204) of the protrusion (203) and partially filling the axial hole (105) in the yoke (100).